Safer Alternatives to Nonsteroidal Antinflamatory Pain Killers (image) University of Pennsylvania School of Medicine Share Print E-Mail Caption The shows the effects of myeloid cell mPGES-1 deletion on plaque macrophage abundance, less in the myeloid mPGES-1 knockout versus wild type. Credit Lihong Chen, MD, PhD, Perelman School of Medicine, University of Pennsylvania. Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.